Printing-telegraph sending apparatus.



F. D. PEARNE.

PmNnNG TELEGRAPHSENDING APPARATUS.

APPLICATION FILED MAR. 22. I909 Patented May 4, 1915.

2 SHEETS-SHEET I.

gigi/Q V Jg F. D. PEARNE.

PRINTING TELEGRAPH SENDING APPARATUS.

APPLICATION man MAR. 22. 1909.

1,137,894. Patented May 4, 1915.

2 SHEETS-SHEET 2.

FRANK D, PEARNE, OF CHICAGO, ILLINOIS, ASSIGNOR OE ONE-HALF TO JAMES E.

MARTINE, OF CHICAGO, ILLINOIS.

PRINTING-TELEGRAPH SENDING APPARATUS.

Specication of Letters Patent.

Patented May d, 1915.

Application led March 22, 1909. Serial No. 484,882.

To all whom it maymcem: Beit known that I, FRANK. D. PnaRNE, a citizen of 'the United States, Vresiding at i Chicago, `county of Cook, State of Illinois,

have made-a certain new and useful Invention in Printing-Telegraph Sending Apparatus, of 4which the following is a specification.

This invention relates to printing telegraph apparatus, and particularly to the sending part of such apparatus.

rIhe object of the invention is to provide means whereby4 it is not necessary for a depressed key of the key-board toreturn to normal or raised position before a second keyl may vbe depressed, thereby greatly increasing the rapidity of operation of the sending apparatus.

A 'further Objectis the provision of means whereby an objectionable circuit derangement of the mechanism -is prevented when one or more keys are vsimultaneously depressed.

A lfurther object is to simplify and -improve the construction of sending apparatus employed in connection with printing telegraph apparatus, more eicient and expeditious in operation.

Other objects of the invention will appear more fully hereinafter.

The invention consists substantially inthe construction, combination, location and relative arrangement of parts, all as willA be more fully hereinafter set forth, as shownv in the accompanying drawings, and finally pointed out in the appended claims.

Referring to the accompanying drawings, and to the various views and. reference signs appearing thereon, Figure l is a view showing ythe release sleeve shifted into position to release the contact operating devices.- Fig. 2 is a view showing the sleeve .released but the 4key remaining in depressed` position. Fig. 3 is aview similar to F i'g.f.2, showing means for operating the release tuatingand 'stop cams... Fig-4 is a-view in diagrammatic sectioncshowing how the simultaneous depressionaof two or more keys will result in no derangement but onlyone of keys -`will -be effective. lFigi 5is a view7 partly broken fout, and partlyin section, showing the relationof thestop cams and the key levers and sleeves.,

.The same spant is designated by .the same and to 'render the same sleeve aci reference sign wherever it occurs throughout the several views.

In my prior application Serial No. 391,020, filed Sept. 3, 1907, I have shown, described and claimed a printing telegraph sending apparatus wherein a series of electrical impulses of differing characteristics are sent over the line wire in quick succession at each depression of a key, such apparatus including, generally, a key board, a` distributer, and a sender, the key board being so organized and arranged that when any one of the keys is depressed it. closes a circuit through a coperating 'group of relays employed in connection with the distributer part of the apparatus. lThese relays select the particular group or combination of impulses corresponding to the particular'key of the keyboard which has been depressed, and connectthe circuits of-Jsaid. selected group or combination of impulses to the proper and correspondingcontacts of the sender apparatus throughwhich the proper line connections .are made. The senderA includes an vautomatically operated-contact making drum operation, to make of a group of relays corresponding to a letter and controlled by depressing a key of. the key-board, until a previously depressed key is released and returns to its normal po'- sition. That is, it is impossible to send a group of impulses corresponding to any particular letter to the line wire, until a previously I,depressed key is released and returns to its -raised position, because current continues to flowuthrough the magnet which controls the sending-drum until a depressed key-returns to its normal position, thereby retaining-the escapement mechanism for the drum in obstructing position. The result is that the lspeed of operation of the apparatus isvery much curtailed,i and, moreover, the operatormust llearn from the operation. of the machine-the length of time 1t is necessary to hold the'key l bel accomplished before complete function to being released.

Ity is'among the special purposes 'of the present invention to avoid these and other objections, and to provide means whereby one or more keys may be depressed before a previously depressed key is released,=and still enable each key to properly perform its function, Athereby enabling the'speed of op- .eration to be vastly increased, and at the same time relieving the operator of the necessity of determining from experience the length of time it is necessary to hold a key in depressed position to enable it to'perform its proper function.

In carrying o t my invention I propose to employ means which are operated by the de-k pression of a key to complete the necessary circuits of the corresponding group of relays, as in my prior application, and to inaugurate vor control' the operation of the sender, whereby the proper line circuits connections are completed, and to bring into operation, bythe actuation of the sender, means for releasing the key controlled contact mechanism without regard to the return of the Vdepressed key. to elevated or raised position. rI also propose to employ means whereby whenA two or more keys are simultaneously depressed only one of them will be effective for the accomplishment of its function, thereby avoidlng Acircuit vderangements which might otherwisebe caused. I also propose to employ means whereby the depression of the key is prevented before a previously depressed key has accomplished its work although the return of the previously depressed key to normal orraised position is not a necessary condition to the proper performance of the function of a subsequentlyl depressed key. These various results may be accomplished in a wide variety of different ways and by a wide variety of specifically different mechanisms.

"While,` therefore, I have shown, and will nowv describe, one construction and arrangement ofmechanism for accomplishing my desired objects, the claims,'is not to be limited-er restricted to the exact details shown.

In the drawing reference sign 10, desig# nates the keys of the key board of a print#y ing telegraph sending apparatus, and 11, the key lever. suitable or convenient construction and ar-v rangement, similar, for instance, to the keyboard of a typewriter, the key levers 11,'being supported for pivotal or'other movement on astud 12, mounted in .the frame 13, of the machine, and normally maintained raised in any suitable manner-',jas'ffor instance, by means of a spring 14,in the usual or well known manner. \Eachfkey' and lever This may be my invention,"as defined 1n l given a These parts may be of any* controls .they circuit connections between a corresponding air` of contact strips 15, 16. e ected by means of a plunger 17, arranged to bedepressed by depressing its cooperating key-lever, and operating, when depressed, to cause contact strip 15, to break contact with a strip 18, and to make contact with the strip 16. These contacts control the circuits of the corresponding groups of relays which send out to line the group of impulses to produce the corresponding letter4 at the distant receiving station.

Instead of the key-levers directly'engaging the plungers 17, when the formery are depressed, I mount on each lever a sliding sleeve 19, carrying a lug or projection 20, designed, When occupying proper relative position, to engage the coperating plunger 17, when the key is depressed, thereby operating said plunger andvclosing the circuit between the contact strips 15, 16. The sleeves 19 are mounted for longitudinal movement along the key levers, tracted position against stop pins 21, on the levers, by means of a retracting spring 32, and when in this position the lugs or projections 20, are in proper relation to bear upon their respective Iungers 17, when the levers are depressed. ach sleeve 19, is provided with a lateral pin 22, with which cooperates a cam, arm or projection 23. These l'cam arms or projections are carried by a `rock shaft 24, suitablyl journaled in the frame work, and operated automatically in any suitable or convenient manner, preferably in cycle with the operation of each lever. To this end, and in one form of apparatus for accomplishing the desired result within the contemplation of my invention, I pivotally mount a lever 28, upon a convenient part of the frame work, and arrange one end thereof to bear against a cam 25 carried by the drum 26, which is given a half revo'- lution at each depression of a lever to effect the proper line connections of the relay group circuit terminals. The other end of lever 28 is connected by means of a link 27, with an arm 29, carried by shaft 24:. The cam 25," is double so that the shaft 24 is rocking oscillation at each'half revolution-of the sender drum 26; A; spring 30,

l -may serve to maintain thejend of lever 28,

'in engagement with the cam 25.1.-

If desired, the automaticreleasin'g sleeves 19, and their copera'tingcam projections 23, may all be thrown out of action at will. This may be accomplished' by hinging or otherwise suitably connecting the upper part 31, of lever 29, to the llower part thereofa's indicated at 50, Fig-3, whereby, by rocking or swingingl said pa'rt 31, out ofengaging relation with respect tothe cam`25', the shifting movements'of the releasing sleeves* are no longer effected. l

As above stated eachcontact controlling and are held in normal replunger 17, when in raised position permits strips 15 and 18 to come into contacting relation, 'and when in depressed position circuit is broken lbetween these strips l'and is completed between strips 1,'5 and 16. All the contact strips 18 are in series with each other and with the strips '15, when all 'of the apparatus .is in 'normal position, so that when yany one of the :plungers is de ressed the circuit 'through vthe -strips 15, 'o' a-l-l of the other plungers is broken, and if two or more plungers are depressed simultaneously or in very close `serjuencc of operation -only that one becomes el ective for the' performance of Aits intended function which happens to lbe the vfirst in 'the series or sequence of operation.

Having now set forth the mechanical construction of `one fform of embodiment of my invention I will now describe-the operation thereof. Assuming 'that all parts are in normal positions ready for operation'ealch key and lits :associated lever, releasing lsleeve and other parts concerned in its voperation will occupy lthe respective positions #shown in Fig. 3. lNow suppose thekey-isdepressed. The first elect isth'a-t yprojection 20, engages the plunger 17, and depresses the latter, thereby breaking-circuit connection between strips 15 and 1-8, and completing-circuitfoonnections between #strips 15 and 16. The

completion of-the circuit connection lbetween strips 15 and 116, closes the Az-:ircui'ts of the group of relays ofthe-distributor which'correspond to :the particular -keylthat -has been depressed,as, y'for instance, 'from ithe battery vB, Fig. 4, wire a, "the particular pair of strips 15, 1-6, which have been Iclosed upon each other, thence 'through wire b, c, fd, etc., as the'case may be, to land-throughthe'corresponding group of I:relays of 'the distributer 2D, and yreturn Wire f, to battery B. The closing of this'cirouit eifectsthe proper selection-*of impulses to be-sent -to line and also inauguratesthe action-of the imechanism which controls the operation of drum '26, through which ithe proper line connections are Amade, 'said fdrum `being caused fby 'such mechanism to Amake one half ofa revolution, allas more full'y shown and'eXplained i-nmy prior application above mentioned. This half revolution of the drum 26, fcauses Ithe cam 25,450 impart one complete oscillation off'lever 28,`thereby, on itsf'move'rnent Vin one direction, Irocking the `shaft 24:, so as to advance -the cam arms or projections 23, into position underneath the pins 22, 5to Tform stopsto prevent the 'depression of'any other key lever untilfthe cam'arms or projections are returned out-o''the fath of movement of 'said tpins when 4the ey 'levers are depressed. At the same `time sthe 'front :edge ofthelcamyarm or projeotion1'23, which cooperates lwithIthetpat'ticularikeyeiever lwhich hasbeen depressed to inaugurato the operation, engages the pin or projection 22 on 1 said lever, as shown in Fig 1, and thereby shifts -or moves the sleeves 1-9, lengthwise upon the key ieveruntil the projection 2O of said sleeve clears 'the contact operating plunger and leaves such plunger free to rise, thereby breaking the circuit connection between strips 15 and 16, and restoring connection between strips 15 and 18, and hence restoring l'the apparatus to `condition to enable Iany other key 1lever to Vbe depressed and to perform its function when depressed, without awaiting the return of the previously depressed =key lever to its raised position.

lIt will be 4observed (that al-l of the foregoing operations take place dur-ing a portion only of the half revolution of the drum 26. In other words, when any particular key is depressed 'to inaugurato fthe cycle of operationsnecessary to transmita letter, the circui-t connections controlled by such key llever are automatically released as soon Vas the key lever has properly performed its function, :and then che or 'more other key levers, may be manipulated without awaiting the return of the'irst key to be'vdepressed to its raised position. The 'continued movement of the -dru`m 26, to complete vits half revoluti'oncauses the cam 25, to .operate the lever 28, in Ithe opposite direction thereby returning the cam arms `or projections 23, out-of stop relation with respect Pto the lpins 22 on the sleeve -of those --key Ilevers which 'have not been depressed, leaving them free to be operated' and at thesame time releasing the pin 22, ofthe sleeve of the lever which was depressed,and hence permitting 'the retracting spring 32, y'to draw said sleeve rack toward initial position. This sleeve, however, will be prevented from attaining fits inal normal position until `the -key lever 'is released and rises, because the 4} :n-ojecti'cfn 20, will fbring up against 'the plunger 17, as shown in Fig.l 2 until the key Vlever returns to lits raised position. As soon l'as the key lever returns to its raised position however, the parts associated therewith are restored to normal position, ready for the nextoperation. Should two'or more 'key levers be depressed at lthe same time -vboth pins 22 will clear their associated cam arms or projeetions23 fbut only one key, the key between the battery :and the-'other depressed key or keys, will be effective since, as is seen Iin Fig, 8,'the-cireuit of the strips 15, is broken when the strip between the battory and :other depressed key or `keys is moved Vbut '-of Contact with its associated strip 118, thereby-doing away with all circuit derangement. Tf, however, two or more keys should not be depressed at the 'same time, evfen if almost the'same t-ime,only on.

and therefoe only the first key Will complete the circuit and be effective.

From the foregoing description it will be seen that I provide a construction of sendling mechanism for printing telegraph apparatus which is simple and efficient, automatic in operation When once inaugurated,

'and wherein a very high speed of transmission can be secured. It Will also be seen that the operator is required merely to manipulate the keys vand is not dependent upon his discretion or experience to determine the length of time he must hold a key in depressed position in order to be sure thaty it has completely performed its proper function. It will also be seen that the return of fa.v key or its lever to raised position is not ,necessary before a second key or other keys "can be manipulated. Having new set forththe ob]ect and nature of my invention, and a construction *embodying the principles thereof, and having described such construction, its purpose, function and mode of operation thereof, what I claim as new and useful and of my own invention, and desire to secure by Letters Patent is 1. In a printing telegraph sending apparatus, the combination with keys, sleeves mounted thereon and ,Y circuits' controlled thereby, of means operating a sleeve for restoring the circuits to normal condition after manipulation of a key, Without regard to the restoration of the key to normal position.

2. In a printing telegraph sending appa- 'ratus, the combination With keys, sleeves ratuscircuit contacts means for contro said qonacts, a key trolling'. means to losefsaid contacts, and 'dericea carried. by but operable independentlyjof the key, While the latter is depressed, forreleasing said controlling means to open said contacts.

' 5. In :a printing telegraph sending appa-y ratus, circuit contacts,.a key for closing said contacts, and means mounted on but operating independently of the key for opening said contacts.'

6. ,In a printin telegraph sending apparatus, a series of eys, circuit contacts conor actuating -said con trolled thereby, plungers operated by the keys for closing the contacts controlled thereby, and means independent of the key for releasing said plungers.

7 In a printing telegraph sending apparatus, a key, a sleeve mounted on said key, means operated by the sleeve when the key is depressed for closing circuit contacts, and means for moving the sleeve on the key to release the contacts Without regard to the key movement.

8. In a printing telegraph sending apparatus, a key, a sleeve movably mounted, circuit contacts arranged to be closed by said sleeve when the key is depressed and means for automatically shifting the sleeve to release the contacts.

9. In a printing telegraph sending apparatus, a key, a sleeve movably mounted thereon, circuit contacts arranged to be operated by said sleeve when the key is depressed, means for normally maintaining sald sleeven operativerelation with respect to the contacts, and means for shifting said sleeve on the key When` in depressed relation to release the contacts.

10. In a printing telegra h sending apparatus, a series of keys, studs carried thereby, circuits controlled by said lkeys, and means made operative when any key is depressed for engaging the studs on the remaining keys to prevent t'he depression thereof.

y11. In a printing. telegraph sending apparatus, a series of keys, studs carried thereby, circuits controlled bysaid keys, means made operative When any key is depressed for engaging the studs on the remaining keys to prevent the depression thereof, and means independent of the movement of the depressed key :tor releasing said stop means.

' 12. In a printing telegraph sending apparatus,-a series of keys, studs carried thereby, circuits controlled by said keys, a series oi cam arms coperating with said studs, and means for operating said cam arms.

13. In a printing telegraph sending apparatus` a series of keyscircuits arranged to be closed by said keys when ldepressed a corresponding series of cam arms, and means actuated by a cam arm, when its associated key is depressed to close a circuit,

- for opening saidcircuit.

14. In a ,printing telegraph sending apparatus, a series of keys, asleeve movably mounted on each key, circuit contacts'closed by said sleev when their'carrying keys are depressed, an cam arms operating to enioc gage the sleeve on a depressed key to shift the same thereby opening said contacts.

15. In a printing telegraph sending apparatus, a series of keys, a sleeve'movably mounted on each key, a stud carried `by each sleeve, a cam' arm operating to engage' its associated` cam arm or projection' 23,

depressed to move the sleeve on said key, means for operating said cam arms, and cil cuit contacts controlled by said sleeves.

16. In a printing telegraph sending apparatus, a series of keys, a sleeve movably mounted on each key, a stud carried by each sleeve, a cam arm arranged to coperateVWit-h each stud, means for moving said cam arms in unison, and circuit contacts controlled by cach sleeve.

17. In a printing telegraph sending apparatus, a. series of keys, a sleeve mot-'ably mounted on each key, and carrying a stud, a cam arm coperating with each stud, and normally held out of coperative relation with respect to the studs, means made operative when any key is depressed for moving all of said cam arms into operative position with respect to the studs, and circuit contacts controlled by said sleeves.

18. In a printing,r telegraph sending apparatus, a series of keys, a sleeve movably mounted on each key and carrying a stud, a cam arm normally held out of the path of said stud, means made operative When a key is depressed for moving the corresponding cam arm into position to engage the Stud on the sleeve of the depressed key, and circuit 'contacts controlled by said sleeve.

19. In a printing telegraph sending apparatus, a series of keys, circuits controlled thereby, stop devices associated With said keys, and operating to release the circuit controlling means when a key is depressed irrespective of the movement of the key,

means for actuating said stop devices, and means for rendering said stop devices inoperative at will.

20. In a printing telegraph sending apparatus, a. series of keys, circuits controlled thereby, automatic release mechanism for said circuits including a rocking lever having a hinged section, means for rocking said lever and means for throwing the hinged section of said lever out of position for use at Will. Y

21. In a printing telegraph sending ap'- paratus, a seriesy of keys, circuits controlled thereby, stop Adevices for said keys, a lever mechanism't'or operating said stop devices and a cam for actuating said lever devices.

22. In a printing telegraph sending apparatus, a series of keys, sleeves movably mounted on said'keys and carrying studs, circuit contact devices controlled by said sleeves, cam arms coperating with said studs and normally held in inoperative relation With respect thereto, a rock'shaft on which said cam arms are mounted, a rocking lever connected to rock said shaft, and a rotatable cam for rocking said lever.

In testimony whereof I have hereunto set my hand in the presence of the subscribing witnesses, on this 15th day of March A. D., 1909.

FRANK D. PEARNE.

Witnesses:

WILLiAM H. Ross, ANNIE M. MELLEN.

Uopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. G. l

tov 

